Door knob



FIG. 1 is a front, right and top perspective view of a door knob,showing my design.

FIG. 2 is a rear, left and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings are included for the purpose ofillustrating portions of the door knob that form no part of the claimeddesign.

CLAIM The ornamental design for a door knob, as shown and described.